Terminal and method of having conversation using instant messaging service therein

ABSTRACT

A terminal and method of having conversation using instant messaging service therein. The terminals displays a message conversation list including at least one message conversation item. Each of the at least one message conversation item represents a corresponding previous message conversation with a corresponding external device. The terminal displays, in response to a first command of selecting a specific one of the at least message conversation item in the message conversation list, at least one received or transmitted message. The at least one received or transmitted message is displayed together with an incomplete file transceiving indicator when a file transceiving was incompletely terminated during a specific previous message conversation corresponding to the specific message conversation item. The terminal resumes, in response to a second command of selecting a file transceiving option displayed together with the at least one received or transmitted message on the display unit, the file transceiving.

This application is a Continuation of co-pending U.S. patent applicationSer. No. 12/352,188 filed Jan. 12, 2009, which claims the benefit of theKorean Patent Application No. 10-2008-0029926, filed on Mar. 31, 2008.The entire contents of all these applications are hereby incorporated byreference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a terminal and corresponding method forconducting a conversation with at least one other terminal using anInstant Messaging Service (IMS).

2. Discussion of the Related Art

Terminals now provide many additional services beside the basic callservice. For example, user's can now access the Internet, play games,watch videos, listen to music, capture images and videos, record audiofiles, etc. Mobile terminals also now provide broadcasting programs suchthat user can watch television shows, sporting programs, videos etc.

A related art terminal allows users to communicate or have aconversation with each other using an IMS service provided with theirterminal. The user can type text in real-time to another user and canalso send and receive photos and other files using the IMS. However, theIMS capabilities are very limited and do not allow the user greatflexibility in dealing with different conversations via the IMS servicehe or she has had with other users.

SUMMARY OF THE INVENTION

Accordingly, one object of the present invention is to address theabove-noted and other drawbacks.

Another object of the present invention is to provide a terminal andcorresponding method for storing contents of a conversation conductedusing the IMS and performing another IMS conversation using the storedcontents.

To achieve these objects and other advantages and in accordance with thepurpose of the invention, as embodied and broadly described herein, thepresent invention provides in one aspect. A terminal including awireless communication unit configured to execute a first conversationwith at least one correspondent party using an instant messagingservice, a memory configured to store contents of the firstconversation, an input unit configured to input a selection signal toselect a second conversation be executed using the stored contents ofthe first conversation, after the first conversation is terminated, anda controller configured to control the wireless communication unit toexecute the second conversation with the at least one correspondentparty using the stored contents of the first conversation according tothe input selection signal.

In another aspect, the present invention provides a method controlling aterminal, and which includes executing a first conversation with atleast one correspondent party using an instant messaging service,storing contents of the first conversation, inputting a selection signalto select a second conversation be executed using the stored contents ofthe first conversation, after the first conversation is terminated, andcontrolling the wireless communication unit to execute the secondconversation with the at least one correspondent party using the storedcontents of the first conversation according to the input selectionsignal.

Further scope of applicability of the present invention will becomeapparent from the detailed description given hereinafter. However, itshould be understood that the detailed description and specificexamples, while indicating preferred embodiments of the invention, aregiven by illustration only, since various changes and modificationswithin the spirit and scope of the invention will become apparent tothose skilled in the art from this detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this application, illustrate embodiment(s) of the invention andtogether with the description serve to explain the principle of theinvention. In the drawings:

FIG. 1 is a block diagram of a terminal according to an embodiment ofthe present invention;

FIG. 2 is a front perspective view of a terminal according to anembodiment of the present invention;

FIG. 3 is a rear perspective view of the terminal shown in FIG. 2;

FIG. 4 is a block diagram of a CDMA wireless communication systemoperable with the terminal of FIGS. 1-3;

FIG. 5 is a flowchart illustrating a conversation method using an IMS ina terminal according to one embodiment of the present invention;

FIGS. 6A to 6C are overviews of display screens illustrating a processfor storing contents of the conversation when the conversation isterminated by a user's selection in a terminal according to oneembodiment of the present invention;

FIGS. 7A and 7B are overviews of display screens illustrating a processfor storing contents of the conversation during the conversation in aterminal according to another embodiment of the present invention;

FIGS. 8A and 8B are overviews of display screens illustrating a processfor storing contents of the conversation when the conversation isforcibly terminated in a terminal according to one embodiment of thepresent invention;

FIGS. 9A and 9B are overviews of display screens illustrating a processfor editing and storing contents of the conversation in a terminalaccording to one embodiment of the present invention;

FIGS. 10 to 11B are overviews of display screens illustrating a processfor allowing a user to view contents of previous conversations in aterminal according to one embodiment of the present invention;

FIGS. 12A and 12B are overviews of display screens illustrating aprocess for allowing a user to view previous conversations or conductanother conversation with a party via contents of a correspondingprevious conversation in a terminal according to one embodiment of thepresent invention;

FIGS. 13A and 13B are overviews of display screens illustrating aprocess for enabling a conversation to be executed with a specificcorrespondent party to be selected in a terminal according to oneembodiment of the present invention;

FIG. 14 is an overview of a display screen illustrating a process forenabling a conversation to be executed to be selected in a terminalaccording to one embodiment of the present invention is displayed;

FIGS. 15A to 18B are overviews of display screens illustrating a processof designating a correspondent party, a file transmission controloperation and a file reception control operation in a terminal accordingto one embodiment of the present invention;

FIGS. 19 to 22B are overviews of display screens illustrating a processof displaying conversation statuses in a terminal according to oneembodiment of the present invention; and

FIGS. 23A to 23C are overviews of display screens illustrating anoperation of performing a conversation using previous contents of theconversation having been performed together with a video call service ina terminal according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in detail to the preferred embodiments of thepresent invention, examples of which are illustrated in the accompanyingdrawings.

FIG. 1 is a block diagram of a mobile terminal 100 according to anembodiment of the present invention. The terminal may be implementedusing a variety of different types of terminals. Examples of suchterminals include mobile phones, user equipment, smart phones,computers, digital broadcast terminals, personal digital assistants,portable multimedia players (PMP) and navigators, etc.

As shown, the mobile terminal 100 includes a wireless communication unit110 having one or more components which permits wireless communicationbetween the mobile terminal 100 and a wireless communication system ornetwork within which the mobile terminal is located.

For example, the wireless communication unit 110 includes a broadcastreceiving module 111 that receives a broadcast signal and/or broadcastassociated information from an external broadcast managing entity via abroadcast channel. The broadcast channel may include a satellite channeland a terrestrial channel.

In addition, the broadcast managing entity generally refers to a systemwhich transmits a broadcast signal and/or broadcast associatedinformation. Examples of broadcast associated information includeinformation associated with a broadcast channel, a broadcast program, abroadcast service provider, etc. For instance, broadcast associatedinformation may include an electronic program guide (EPG) of digitalmultimedia broadcasting (DMB) and electronic service guide (ESG) ofdigital video broadcast-handheld (DVB-H).

In addition, the broadcast signal may be implemented as a TV broadcastsignal, a radio broadcast signal, and a data broadcast signal, amongothers. The broadcast signal may further include a broadcast signalcombined with a TV or radio broadcast signal.

The broadcast receiving module 111 is also configured to receivebroadcast signals transmitted from various types of broadcast systems.For example, such broadcasting systems include the digital multimediabroadcasting-terrestrial (DMB-T) system, the digital multimediabroadcasting-satellite (DMB-S) system, the digital videobroadcast-handheld (DVB-H) system, the data broadcasting system known asmedia forward link only (MediaFLO®) and the integrated services digitalbroadcast-terrestrial (ISDB-T) system among others. Receiving multicastsignals is also possible. Further, data received by the broadcastreceiving module 111 may be stored in a suitable device, such as amemory 160.

The wireless communication unit 10 also includes a mobile communicationmodule 112 that transmits/receives wireless signals to/from one or morenetwork entities (e.g., base station, Node-B). Such signals mayrepresent audio, video, multimedia, control signaling, and data, amongothers.

Also included is a wireless Internet module 113 that supports Internetaccess for the mobile terminal. The module 113 may be internally orexternally coupled to the terminal. The wireless communication unit 110also includes a short-range communication module 114 that facilitatesrelatively short-range communications. Suitable technologies forimplementing this module include radio frequency identification (RFID),infrared data association (IrDA), ultra-wideband (UWB), as well at thenetworking technologies commonly referred to as Bluetooth and ZigBee, toname a few.

A position-location module 115 is also included in the wirelesscommunication unit 110 and identifies or otherwise obtains the locationof the mobile terminal 100. The position-location module 115 may beimplemented using global position ng system (GPS) components whichcooperate with associated satellites, network components, andcombinations thereof.

In addition, as shown in FIG. 1, the mobile terminal 100 also includesan Audio/video (A/V) input unit 120 that provides audio or video signalsto the mobile terminal 100. As shown, the A/V input unit 120 includes acamera 121 and a microphone 122. The camera 121 receives and processesimage frames of still pictures or video.

Further, the microphone 122 receives an external audio signal while theportable device is in a particular mode, such as a phone call mode,recording mode and voice recognition mode. The received audio signal isthen processed and converted into digital data. Also, the portabledevice, and in particular, the A/V input unit 120, typically includesassorted noise removing algorithms to remove noise generated in thecourse of receiving the external audio signal. In addition, datagenerated by the A/V input unit 120 may be stored in the memory 160,utilized by an output unit 150, or transmitted via one or more modulesof the communication unit 110. If desired, two or more microphonesand/or cameras may be used.

The mobile terminal 100 also includes a user input unit 130 thatgenerates input data responsive to user manipulation of an associatedinput device or devices. Examples of such devices include a keypad, adome switch, a touchpad (e.g., static pressure/capacitance), a jog wheeland a jog switch. A specific example is one in which the user input unit130 is configured as a touchpad in cooperation with a touch screendisplay, which will be described in more detail below.

A sensing unit 140 is also included in the mobile terminal 100 andprovides status measurements of various aspects of the mobile terminal100. For instance, the sensing unit 140 may detect an open/close statusof the mobile terminal 100, relative positioning of components (e.g., adisplay and keypad) of the mobile terminal 100, a change or position ofthe mobile terminal 100 or a component of the mobile terminal 100, apresence or absence of user contact with the mobile terminal 100,orientation or acceleration/deceleration of the mobile terminal 100,etc.

As an example, when the mobile terminal 100 is a slide-type mobileterminal, the sensing unit 140 may sense whether a sliding portion ofthe mobile terminal 100 is open or closed. Other examples include thesensing unit 140 sensing the presence or absence of power provided by apower supply 190, the presence or absence of a coupling or otherconnection between an interface unit 170 and an external device, etc.

Further, the interface unit 170 is often implemented to couple themobile terminal 100 with external devices. Typical external devicesinclude wired/wireless headphones, external chargers, power supplies,storage devices configured to store data (e.g., audio, video, pictures,etc.), earphones, and microphones, among others. In addition, theinterface unit 170 may be configured using a wired/wireless data port, acard socket (e.g., for coupling to a memory card, a subscriber identitymodule (SIM) card, a user identity module (UIM) card, a removable useridentity module (RUIM) card, etc.), audio input/output ports and videoinput/output ports.

The output unit 150 generally includes various components which supportthe output requirements of the mobile terminal 100. The mobile terminal100 also includes a display 151 that visually displays informationassociated with the mobile terminal 100. For instance, if the mobileterminal 100 is operating in a phone call mode, the display 151 willgenerally provide a user interface or graphical user interface whichincludes information associated with placing, conducting, andterminating a phone call. As another example, if the mobile terminal 100is in a video call mode or a photographing mode, the display 151 mayadditionally or alternatively display images which are associated withthese modes.

Further, the display 151 also preferably includes a touch screen workingin cooperation with an input device, such as a touchpad. Thisconfiguration permits the display 151 to function both as an outputdevice and an input device. In addition, the display 151 may beimplemented using display technologies including, for example, a liquidcrystal display (LCD), a thin film transistor-liquid crystal display(TFT-LCD), an organic light-emitting diode display (OLED), a flexibledisplay and a three-dimensional display.

The mobile terminal 100 may also include one or more of such displays.An example of a two-display embodiment is one in which one display isconfigured as an internal display (viewable when the terminal is in anopened position) and a second display configured as an external display(viewable in both the open and closed positions).

FIG. 1 further shows the output unit 150 having an audio output module152 which supports the audio output requirements of the mobile terminal100. The audio output module 152 is often implemented using one or morespeakers, buzzers, other audio producing devices, and combinationsthereof.

Further, the audio output module 152 functions in various modesincluding a call-receiving mode, a call-placing mode, a recording mode,a voice recognition mode and a broadcast reception mode. Duringoperation, the audio output module 152 outputs audio relating to aparticular function (e.g., call received, message received, and errors).

In addition, the output unit 150 is further shown having an alarm 153,which is used to signal or otherwise identify the occurrence of aparticular event associated with the mobile terminal 100. Typical eventsinclude a call received, a message received and user input received. Anexample of such output includes the providing of tactile sensations(e.g., vibration) to a user. For instance, the alarm 153 may beconfigured to vibrate responsive to the mobile terminal 100 receiving acall or message.

As another example, a vibration is provided by the alarm 153 responsiveto receiving user input at the mobile terminal 100, thus providing atactile feedback mechanism. Further, the various outputs provided by thecomponents of the output unit 150 may be separately performed, or suchoutput may be performed using any combination of such components.

In addition, the memory 160 is generally used to store various types ofdata to support the processing, control, and storage requirements of themobile terminal 100. Examples of such data include program instructionsfor applications operating on the mobile terminal 100, call history,contact data, phonebook data, messages, pictures, video, etc.

Further, the memory 160 shown in FIG. 1 may be implemented using anytype or combination of suitable volatile and non-volatile memory orstorage devices including random access memory (RAM), static randomaccess memory (SRAM), electrically erasable programmable read-onlymemory (EEPROM), erasable programmable read-only memory (EPROM),programmable read-only memory (PROM), read-only memory (ROM), magneticmemory, flash memory, magnetic or optical disk, card-type memory, orother similar memory or data storage device.

The terminal 100 also includes a controller 180 that typically controlsthe overall operations of the mobile terminal 100. For instance, thecontroller 180 performs the control and processing associated with voicecalls, data communications, instant message communications, video calls,camera operations and recording operations. As shown in FIG. 1, thecontroller 180 may also include a multimedia module 181 for providingmultimedia playback functions. The multimedia module 181 may beconfigured as part of the controller 180, or may be implemented as aseparate component.

In addition, a power supply 190 provides power used by the variouscomponents for the portable device. The provided power may be internalpower, external power, or combinations thereof.

Next, FIG. 2 is a front side view of the mobile terminal 100 accordingto an embodiment of the present invention. As shown in FIG. 2, themobile terminal 100 includes a first body 200 configured to slideablycooperate with a second body 205. The user input unit 130 described inFIG. 1 may include a first input unit such as function keys 210, asecond input unit such as a keypad 215, and a third input unit such asside keys 245.

The function keys 210 are associated with the first body 200, and thekeypad 215 is associated with the second body 205. The keypad 215includes various keys (e.g., numbers, characters, and symbols) to enablea user to place a call, prepare a text or multimedia message, andotherwise operate the mobile terminal 100.

In addition, the first body 200 slides relative to the second body 205between open and closed positions. In a closed position, the first body200 is positioned over the second body 205 in such a manner that thekeypad 215 is substantially or completely obscured by the first body200. In the open position, user access to the keypad 215, as well as thedisplay 151 and function keys 210, is possible. The function keys 210are convenient to a user for entering commands such as start, stop andscroll commands.

Further, the mobile terminal 100 is operable in either a standby mode(e.g., able to receive a call or message, receive and respond to networkcontrol signaling), or an active call mode. Typically, the mobileterminal 100 functions in a standby mode when in the closed position,and an active mode when in the open position. However, the modeconfiguration may be changed as required or desired.

In addition, the first body 200 is formed from a first case 220 and asecond case 225, and the second body 205 is formed from a first case 230and a second case 235. The first and second cases are preferably formedfrom a suitably ridge material such as injection molded plastic, orformed using metallic material such as stainless steel (STS) andtitanium (Ti).

If desired, one or more intermediate cases may be provided between thefirst and second cases of one or both of the first and second bodies 200and 205. In addition, the first and second bodies 200 and 205 aretypically sized to receive electronic components used to support theoperation of the mobile terminal 100.

Also, the first body 200 includes the camera 121 and the audio outputunit 152, which is configured as a speaker, positioned relative to thedisplay 151. The camera 121 may also be constructed in such a mannerthat it can be selectively positioned (e.g. rotated, swiveled, etc.)relative to the first body 200.

Further, the function keys 210 are positioned adjacent to a lower sideof the display 151. As discussed above, the display 151 can beimplemented as an LCD or OLED. The display 151 may also be configured asa touch screen having an underlying touchpad which generates signalsresponsive to user contact (e.g., finger, stylus, etc.) with the touchscreen.

Also, the second body 205 includes the microphone 122 positionedadjacent to the keypad 215, and side keys 245, which are one type of auser input unit, positioned along the side of the second body 205.Preferably, the side keys 245 are configured as hot keys, such that theside keys 245 are associated with a particular function of the mobileterminal 100. As shown, the interface unit 170 is positioned adjacent tothe side keys 245, and the power supply 190 in a form of a battery islocated on a lower portion of the second body 205.

FIG. 3 is a rear side view of the mobile terminal 100 shown in FIG. 2.As shown in FIG. 3, the second body 205 includes the camera 121, and anassociated flash 250 and mirror 255. The flash 250 operates inconjunction with the camera 121 of the second body 205, and the mirror255 is useful for assisting a user to position the camera 121 in aself-portrait mode. In addition, the camera 121 of the second body 205faces a direction which is opposite to a direction faced by the camera121 of the first body 200 shown in FIG. 2.

In addition, each of the cameras 121 of the first and second bodies 200and 205 may have the same or different capabilities. For example, in oneembodiment, the camera 121 of the first body 200 operates with arelatively lower resolution than the camera 121 of the second body 205.Such an arrangement works well during a video conference call, forexample, in which reverse link bandwidth capabilities may be limited.Further, the relatively higher resolution of the camera 121 of thesecond body 205 (FIG. 3) is useful for obtaining higher quality picturesfor later use.

The second body 205 also includes the audio output module 152 configuredas a speaker, and which is located on an upper side of the second body205. The audio output modules of the first and second bodies 200 and 205may also cooperate together to provide stereo output. Moreover, eitheror both of these audio output modules may be configured to operate as aspeakerphone.

The terminal 100 also includes a broadcast signal receiving antenna 260located at an upper end of the second body 205. The antenna 260functions in cooperation with the broadcast receiving module 111 (FIG.1). If desired, the antenna 260 may be fixed or configured to retractinto the second body 205. Further, the rear side of the first body 200includes a slide module 265, which slideably couples with acorresponding slide module located on the front side of the second body205.

In addition, the illustrated arrangement of the various components ofthe first and second bodies 200 and 205 may be modified as required ordesired. In general, some or all of the components of one body mayalternatively be implemented on the other body. Further, the locationand relative positioning of such components may be positioned atlocations which differ from those shown by the representative figures.

In addition, the mobile terminal 100 of FIGS. 1-3 may be configured tooperate within a communication system which transmits data via frames orpackets, including both wireless and wireline communication systems, andsatellite-based communication systems. Such communication systemsutilize different air interfaces and/or physical layers.

Examples of such air interfaces utilized by the communication systemsinclude, for example, frequency division multiple access (FDMA), timedivision multiple access (TDMA), code division multiple access (CDMA),and universal mobile telecommunications system (UMTS), the long termevolution (LTE) of the UMTS, and the global system for mobilecommunications (GSM). By way of a non-limiting example only, furtherdescription will relate to a CDMA communication system, but suchteachings apply equally to other system types.

Next, FIG. 4 illustrates a CDMA wireless communication system having aplurality of mobile terminals 100, a plurality of base stations 270, aplurality of base station controllers (BSCs) 275, and a mobile switchingcenter (MSC) 280.

The MSC 280 is configured to interface with a public switch telephonenetwork (PSTN) 290, and the MSC 280 is also configured to interface withthe BSCs 275. Further, the BSCs 275 are coupled to the base stations 270via backhaul lines. In addition, the backhaul lines may be configured inaccordance with any of several interfaces including, for example, E1/T1,ATM, IP, PPP, Frame Relay, HDSL, ADSL, or xDSL. Further, the system mayinclude more than two BSCs 275.

Also, each base station 270 may include one or more sectors, each sectorhaving an omnidirectional antenna or an antenna pointed in a particulardirection radially away from the base station 270. Alternatively, eachsector may include two antennas for diversity reception. In addition,each base station 270 may be configured to support a plurality offrequency assignments, with each frequency assignment having aparticular spectrum (e.g., 1.25 MHz, 5 MHz).

The intersection of a sector and frequency assignment may be referred toas a CDMA channel. The base stations 270 may also be referred to as basestation transceiver subsystems (BTSs). In some instances, the term “basestation” may be used to refer collectively to a BSC 275, and one or morebase stations 270.

The base stations 270 may also be denoted as “cell sites.”Alternatively, individual sectors of a given base station 270 may bereferred to as cell sites. Further, a terrestrial digital multimediabroadcasting (DMB) transmitter 295 is shown broadcasting to mobileterminals 100 operating within the system.

In addition, the broadcast receiving module 111 (FIG. 1) of the mobileterminal 100 is typically configured to receive broadcast signalstransmitted by the DMB transmitter 295. Similar arrangements may beimplemented for other types of broadcast and multicast signaling asdiscussed above.

FIG. 4 further illustrates several global positioning system (GPS)satellites 300. Such satellites facilitate locating the position of someor all of the mobile terminals 100. In FIG. 4, two satellites are shown,but positioning information may be obtained with greater or fewersatellites.

In addition, the position-location module 115 (FIG. 1) of the mobileterminal 100 is typically configured to cooperate with the satellites300 to obtain desired position information. However, other types ofposition detection technology, such as location technology that may beused in addition to or instead of GPS location technology, mayalternatively be implemented. Some or all of the GPS satellites 300 mayalternatively or additionally be configured to provide satellite DMBtransmissions.

Further, during typical operation of the wireless communication system,the base stations 270 receive sets of reverse-link signals from variousmobile terminals 100. The mobile terminals 100 engage in calls,messaging, and other communications.

In addition, each reverse-link signal received by a given base station270 is processed within that base station 270, and the resulting data isforwarded to an associated BSC 275. The BSC 275 provides call resourceallocation and mobility management functionality including soft handoffsbetween the base stations 270.

Further, the BSCs 275 also route the received data to the MSC 280, whichprovides additional routing services for interfacing with the PSTN 290.Similarly, the PSTN interfaces with the MSC 280, and the MSC 280interfaces with the BSCs 275. The BSCs 275 also control the basestations 270 to transmit sets of forward-link signals to the mobileterminals 100.

In the following description, a control method applicable to theabove-configured mobile terminal 100 is explained with respect tovarious embodiments. However, the following embodiments can beimplemented independently or through combinations thereof. In addition,in the following description, it is assumed that the display 151includes a touch screen.

The IMS mentioned in the following description of the present inventionis a service capable of performing a real-time data communicationincluding a text conversation, a voice conversation, a videoconversation, a file transmission/reception, etc. based on an Internetprotocol between a plurality of terminals provided with the IMSimplementation functions. The IMS also supports a mobile IMS betweenmobile terminals.

FIG. 5 is a flowchart illustrating a conversation method using an IMS ina terminal according to one embodiment of the present invention. FIG. 1will also be referred to throughout this description. Further, asdiscussed above, the conversation using the IMS can include a voiceconversation, a video conversation, a text conversation, etc. In thepresent description, the conversation or communication between differentusers will assumed to be a text conversation, but the present inventionapplies to all other types of IMS conversations. In addition, theconversations can be between two users or between a plurality of users(i.e., 1:N conversations).

In addition, before performing a conversation process using the IMSaccording to an embodiment of the present invention, the terminal 100initiates an IMS with a server that manages the IMS. That is, to performthis initiation process, the terminal 100 receives initiationinformation (or log-on information), e.g., an ID (identification),password or various types of authentication information from a user viathe user input unit 130.

Further, when receiving the initiation information from the user, theterminal 100 sends an initiation request message of the IMS to a servervia the wireless communication unit 110, and more particularly, via thewireless Internet module 113. The terminal 100 then receives anacknowledgement message for approving authority of the terminal 100 forusing the IMS from the server.

Referring to FIG. 5, the terminal 100 executes a conversation with atleast one correspondent party via the wireless communication module 110,and more particularly, via the wireless Internet module 113 using theIMS (S510). Subsequently, the terminal 100 stores contents of theconversation in the memory 160 (S520).

In addition, the storing step S520 can be performed if there exists auser's setting operation or if the conversation is forcibly terminated.For instance, ‘if the user's setting operation exists’ corresponds to asituation that ‘automatic storage of contents of the conversation for anend of conversation or a conversation in progress’ is preset by a user,and a situation that ‘contents of the conversation storage’ is selectedby a user for an end of conversation or a conversation in progress, orthe like.

Also, ‘if the conversation execution is forcibly terminated’ correspondsto a situation that an IMS or a conversation is terminated due to awireless Internet access interruption attributed to network instability,terminal power-off, conversation disconnection by a correspondent party,video call connection or the like. If the conversation is forciblyterminated, the terminal 100 automatically stores the contents of theconversation or may store the contents of the conversation if a userselects a conversation storage option (presetting or end timing point).

In addition, if the contents of the conversation are not stored by oneof the above mentioned methods, the terminal 100 can receive thecontents of the conversation from a correspondent terminal via thewireless communication unit 110 and then store the received contents ofthe conversation in the memory 160. In this instance, the terminal 100sends a contents of the conversation transmission request message to thecorrespondent terminal and then receives the corresponding contents ofthe conversation, or can receive the contents of the conversation fromthe correspondent terminal unilaterally regardless of the request.

The storing step S520 will now be explained with reference to theaccompanying drawings. In more detail, FIGS. 6A to 6C are displayscreens illustrating a process for storing contents of the conversationwhen the conversation is terminated by a user's selection in a terminalaccording to one embodiment of the present invention.

When having a text conversation only (FIG. 6A(a)) or together with avideo call (FIG. 6A(b)), if the user selects an End option 611 toterminate the conversation in FIG. 6A, the terminal displays a window620 allowing the user to store the contents of the conversation (FIG.6B).

Then, if the user selects the ‘Yes’ option in the window 620, theterminal 100 stores the contents of the contents of the conversation andoutputs a phrase 630 or other type of indication indicating that thecontents of the conversation has been stored (FIG. 6C).

In addition, in another embodiment, the user can preset a particularstorage option such as ‘automatic storage of the contents of theconversation when the conversation is terminated’. In this instance, theterminal 100 directly enters the stage shown in FIG. 6C withoutexecuting the stage shown in FIG. 6B.

Next, FIGS. 7A and 7B are overviews of display screens illustrating aprocess for storing contents of the conversation in a terminal accordingto another embodiment of the present invention. In this embodiment, whenthe user presets the ‘automatic storage of the contents of theconversations during the conversation’, the terminal 100 stores thecontents of the contents of the conversation at a random timing point orperiodically (FIG. 7A).

The terminal 100 also displays an identifier 711 indicating that thecontents of the conversation are being stored on a prescribed area ofthe screen (FIG. 7A). Further, the identifier can be represented as oneof various methods including an icon, a symbol, a text, an image, avoice announcement, a bell sound, an audio signal, a vibration, flashinglights, etc. The user can also set the type of identification using theappropriate menu options provided with the terminal according to anembodiment of the present invention.

In addition, and as shown in FIG. 7B, if the user selects a Store option712 to store the contents of the conversation during the conversation,the terminal stores the contents and informs the user the contents arebeing stored.

Next, FIGS. 8A and 8B are overviews of display screens illustrating aprocess for storing contents of a conversation when the conversation isforcibly terminated in a terminal according to one embodiment of thepresent invention.

In this embodiment, when the conversation is forcibly terminated duringthe course of the conversation, the terminal 100 displays a window 810indicating that the conversation is forcibly terminated and allowing theuser to select whether or not to store the contents of the contents ofthe conversation (FIG. 8A). If the user selects the ‘Yes’ option, theterminal 100 stores the contents of the conversation and outputs aphrase announcing that the contents of the conversation has been stored.

Alternatively, and as shown in FIG. 8B, when the conversation isforcibly terminated during the course of the conversation, the terminal100 automatically stores the contents of the conversation and thendisplays a phrase 820 indicating that the contents of the conversationhas been stored. FIG. 8B is also applicable to situation in which theuser has preset the automatic storing of the contents of theconversation.

In addition, in the storing step S520 in FIG. 5, the terminal 100 alsoprovides the user with the option of editing and storing the contents ofthe conversation in the memory 160. Further, the option of editing thecontents can be executed when storing the contents of the conversationor on previously stored contents of the conversation.

The editing operation will now be explained with reference to FIGS. 9Aand 9B. In more detail, FIGS. 9A and 9B are overviews of display screensillustrating a process for editing and storing contents of theconversation when the terminal 100 stores the contents of theconversation according to one embodiment of the present invention.

As shown in FIG. 9A, when the user selects an Edit option 911 forediting the contents of the conversation, the terminal 100 displays anediting operation list on a screen of the terminal 100 (FIG. 9B). Forinstance, the editing operation list can include a storing option, adeletion option, a font setting option, an emphasis option, etc.

Each of these editing operations can be performed on a whole part or aprescribed portion of the contents of the conversation. Further, theediting operation list can include all types of editing operationsexecutable on text as well as the above-mentioned operations. Also, theprescribed portion of the contents of the conversation can include apartial content of the conversation, contents of the conversation with aspecific correspondent party, a specific phrase, and the like.

Therefore, based on the editing operation selected from the editingoperation list, the terminal 100 performs one of the storing operation,the deleting operation, the font setting operation, the emphasizingoperation and the like on the whole part or a prescribed portion of thecontents of the conversation.

Further, in the storing step S520 in FIG. 5, if the terminal 100 istransceiving a file or executing a multiple service when storing thecontents of the conversation, the terminal 100 stores state informationrelevant to the file transceiving or the multiple service execution inthe memory 160 together with the contents of the conversation.

In addition, the multiple services include a service for simultaneouslyexecuting a plurality of Internet protocol based wireless datatransceiving services including an IMS, a video call service, a videosharing service, a network game service, a broadcast signal sharingservice and the like.

For instance, referring to FIG. 6A(a), if a file transceiving is inprogress when the contents of the conversation are being stored, theterminal 100 stores file transceiving state information such as a filetransceiving subject, file information, a file transceiving progressrate, a file storage location (if the terminal 100 is in the course oftransmission), and the like.

Referring to FIG. 6A(b), if multiple services and more particularly, aconversation via the IMS and a video call service are being executedwhen storing the contents of the conversation, the terminal 100 storesmultiple service relevant state information such as a video callsubject, images of capturing the video call in termination, a terminalidentification number of a video caller, and the like.

Referring again back to FIG. 5, after completion of the termination andstorage of the contents in step S510, the terminal 100 allows a user toselect a conversation execution operation, which uses a previouslystored contents of the conversation (hereinafter named ‘previouscontents of the conversation’), according to a selecting operation bythe user via the user input unit 130 (S530).

The selecting step S530 will now be explained in more detail. Inparticular, FIGS. 10 to 11B are overviews illustrating a process forallowing a user to view contents of a previous conversation according toone embodiment of the present invention is displayed.

Referring to FIG. 10, while displaying a correspondent party list 1010including a plurality of correspondent parties agreed to mutuallyexecute data communication via the IMS, the terminal 100 displays a ViewPrevious Conversation option 1011 that the user can select.

If user selects the View Previous Conversation option 1011 in FIG. 10,as shown in FIG. 11A, the terminal 100 displays a previous conversationlist 1110 on the screen. The user can also scroll through the list 1110to see additional users he or she has had a previous conversation withusing the scroll bar, a direction key and the like. The terminal 100also displays current status information of the parties the userpreviously had a conversation with (e.g., [on-line, [off-line], etc.).The terminal 100 also displays some of the contents of the previouscontents for the listed parties.

Further, if the user selects a party from the list 1110 and selects theView Previous Conversation option 1111 in FIG. 11A, the terminal 100displays the contents of the previous conversation for that particularuser. Further, in another embodiment as shown in FIG. 11B, if the userselects the View Previous Conversation option 1011 in FIG. 10, theterminal 100 displays a previous conversation list 1120 including atleast one previous conversation item. As shown, the previousconversation list 1120 includes, per the previous conversation item, adate, an area for selecting previous contents of the conversationprovision, a portion of a contents of the conversation, an area forindicating a correspondent party of a previous conversation andselecting a current status information provision of each correspondentparty and the like.

For instance, if a content viewing area of a specific previousconversation item is selected, the terminal 100 displays the previouscontents of the conversation corresponding to the specific previousconversation item on a screen of the terminal. If a correspondent partyinformation viewing area of a specific previous conversation item isselected, the terminal 100 displays a correspondent party participatingin the previous conversation of the specific previous conversation itemand current status information of each correspondent party on a screenof the terminal 100. In addition, if the user selects the View PreviousConversation option 1111 in FIG. 11B, the terminal 100 displays theprevious contents of the conversation.

Next, FIGS. 12A and 12B are overviews illustrating processes forallowing a user to execute a new conversation via a list of users or viapreviously stored contents in a terminal according to one embodiment ofthe present invention.

As shown in FIGS. 12A and 12B, a user is able to select a correspondentparty to have a conversation with from a displayed correspondent partylist 1210. For example, if the user selects ‘Young Hee’, the terminal100 sends a conversation request to a terminal of ‘Young Hee’ via thewireless communication unit 110 and then performs a conversation withthe correspondent party designated as ‘Young Hee’.

Further, as shown in FIG. 12A, when the user selects ‘Young Hee’ as aconversation correspondent party, the terminal displays options 1212including ‘conversation’ (with ‘Young Hee’) or ‘previous conversation’(with ‘Young Hee’). If the user selects the ‘previous conversation’option in FIG. 12A, the terminal 100 displays options 1213 (see FIG.12B) including ‘View previous conversation’ (with ‘Young Hee’) and‘Execute previous conversation’ (with the ‘Young Hee’).

Then, if the user selects ‘View previous conversation from the options1213 in FIG. 12B, the terminal 100 displays the contents of the previousconversation with ‘Young Hee’. If the user selects the ‘Execute previousconversation’ option from the options 1213 in FIG. 12B, the terminal 100initiates a new or another conversation between the correspondent partyof the previous conversation and the user using the contents of theprevious conversation with the correspondent party ‘Young Hee’.

Thus, in FIG. 12A, the user can select the ‘previous conversation’option from the options 1212 in FIG. 12A, and then select the “ViewPrevious conversation’ option from the options 1213 in FIG. 12B to viewthe contents of the previous conversation with the party selected inFIG. 12A. Alternatively, the user can select the ‘Execute previousconversation’ option to establish another IMS session with the selectedparty. In addition, the user can also select the ‘conversation’ optionin FIG. 12A to conduct a normal IMS session with the correspondingparty.

Further, in one example, the terminal 100 can conduct or execute aconversation with the correspondent party based on the contents of theprevious conversation using the correspondent party's user ID (selectedin FIG. 12A or by reading the correspondent party's ID from the storedcontents) or by using other information in the stored contents (e.g., IPaddress, telephone number, etc.). The terminal 100 can alsoadvantageously display the contents of the stored previous conversationwhen starting the new conversation with the correspondent party suchthat both parties can quickly determine where the previous conversationhad ended.

Next, FIGS. 13A and 13B are overviews of display screens illustrating aprocess for allowing a user to execute a conversation with a specificselected correspondent party in a terminal according to one embodimentof the present invention is displayed. In this embodiment, the terminal100 receives a conversation request from a specific one of a pluralityof correspondent parties contained in a correspondent party list 1310and performs a conversation with the specific correspondent party inresponse to the conversation request.

For example, and as shown in FIG. 13A, if the terminal 100 receives aconversation request from ‘Min Young’, the user is able to selectoptions including ‘conversation’ or ‘previous conversation’ 1321 with‘Min Young’. If the user selects the ‘previous conversation’ option 1321in FIG. 13A, the terminal 100 displays a window 1330 including theoptions ‘View previous conversation’ and ‘Execute previous conversation’(see FIG. 13B). The user can then select the ‘View previousconversation’ option to view the contents of the previous conversationwith ‘Min Young’ or select the ‘Execute previous conversation’ option tohave the terminal 100 initiate another IMS conversation with ‘MinYoung’. As discussed above, the terminal 100 can create the new IMSconversation session to include the contents of the previousconversation so each user can easily see where the previous conversationended.

In addition, if there is a plurality of previous conversations with thecorrespondent party ‘Min Young’, the terminal 100 performs aconversation using the previous conversation selected by the user or theprevious conversation that was last performed. Also, if the user selectsthe ‘View previous conversation’ option in FIG. 13B, the terminal 100displays the contents of the previous conversation with thecorrespondent party ‘Min Young’ on the screen of the terminal. Inaddition, in FIG. 13A, if the user selects the ‘conversation’ option inFIG. 13A, the terminal 100 performs a normal conversation with thecorrespondent party ‘Min Young’ using an IMS.

Next, FIG. 14 is an overview of a display screen illustrating a processfor allowing a user to execute a conversation when a conversation thatway forcibly terminated is fixed in a terminal according to oneembodiment of the present invention is displayed.

Referring to FIG. 14, if the conversation that has been forciblyterminated has been fixed or settled, the terminal 100 announces thatthe reason for the forced termination of the conversation has beensettled and displays a window 1420 allowing the user to select whetherto execute a conversation using the stored previous contents of theconversation according to the forced termination of the conversation. Ifthe user selects the ‘Yes’ option, the terminal 100 restarts theprevious conversation or starts a new conversation by designating thecorrespondent party or parties of the forcibly terminated conversationand the user.

In addition, in this embodiment, the terminal 100 displays thecorrespondent party list 1310 when the window 1420 is displayed.However, the terminal 100 can display the window 1420 at anytime otherthan when displaying the correspondent party list 1310. Further, if theprevious IMS connection is still available, the terminal 100 can usethis IMS connection to restart the IMS conversation again.Alternatively, if the problem has been fixed, but the previous IMSconnection is not available, the terminal 100 can request another IMSconnection using the correspondent party's username, etc.

Referring again to FIG. 5, the terminal 100 designates a correspondentparty to participate in a conversation using the previous contents ofthe conversation (S540). For instance, the designating step S540 can beperformed by the controller 180 according to an input signal via theuser input unit 130.

In addition, in the designating step S540, the terminal 100 designates acorrespondent party selected by the user via the user input unit 130 orautomatically designates a party in a status capable of having aconversation. Furthermore, in the designating step S540, if the terminal100 is transmitting a file together with a previous conversation, theterminal 100 designates at least one of a presence or non-presence of afile transmission and a file receiving correspondent party according toan input signal via the user input unit 130.

Also, in the designating step S540, if the terminal 100 is receiving afile together with a previous conversation, the terminal 100 sends amessage containing information for designating at least one of apresence or non-presence of a file transmission and a file receivingcorrespondent party to the correspondent party of the file, which isbeing received, via the wireless communication unit 110 according to aninput signal via the user input unit 130.

In addition, the designating step S540 can be omitted in the presentinvention, if necessary. If the designating step S540 is omitted, theterminal 100 designates all parties of the previous conversation as thecorrespondent parties of the conversation to be executed using thecontents of the previous conversation and designates a subject of a filetransceived in the course of the previous conversation as allcorrespondent parties (except a file transmitting party).

The designating step S540 will now be explained in more detail. That is,FIGS. 15A to 18 are overviews of display screens illustrating a processof designating a correspondent party using previous contents of theconversation, a file transmission control operation and a file receptioncontrol operation in a terminal according to one embodiment of thepresent invention.

In this embodiment, while the terminal 100 displays a window 1510including previous contents of a conversation with a particular party,the user is able to select a ‘Designate Target’ option 1511 fordesignating a correspondent party to being a new IMS session with, afile transmitting target, a file receiving target and the like (FIG.15A).

That is, if the user selects the ‘Designate Target’ option 1511, theterminal 100 displays a designated target list 1512 (FIG. 15B). If theuser selects the ‘Conversation correspondent party’ option from thedesignated target list 1512, the terminal 100 displays a list 1513 ofall parties that participated in the previous conversation (FIG. 16).Therefore, the user is able to select a correspondent party toparticipate in a conversation with using the previous contents of theconversation from the list 1513.

In addition, in FIG. 15B. If the user selects the ‘File transmission’option from the designated target list 1512, the terminal 100 displays alist 1514 of correspondent parties that have participated in theprevious conversation (FIG. 17).

Thus, the user is able to designate a transmission subject of the file,which was being transmitted by the terminal 100 in the conversationusing the previous contents of the conversation, from the list 1514.Similarly, if the user selects the ‘File reception’ option from thedesignated target list 1512 in FIG. 15B, the terminal 100 displays alist 1515 of parties (except a file transmitting correspondent party)having participated in the conversation corresponding to the displayedprevious contents of the conversation (FIG. 18A).

Therefore, the user is able to designate a receiving correspondent partyof the file, which was being received from the file transmittingcorrespondent party in the conversation, using the previous contents ofthe conversation, from the list 1515.

Subsequently, the terminal 100 transmits a message, which contains atleast one information or item including a presence or non-presence offile reception and a file receiving correspondent party, to the filetransmitting correspondent party and informs the user that a filetransmitting request message is in progress to the selected party orparties (FIG. 18B).

Further, as current status information of each of the correspondentparties having participated in the previous conversation shown in FIGS.15 to 18B is displayed together, the user can easily select aconversation correspondent party or a receiving correspondent party of afile which was being transmitted by a terminal of a specificcorrespondent party.

Referring again to FIG. 5, if the conversation execution using theprevious contents of the conversation is selected in the selecting stepS530, the terminal 100 executes a conversation using the previouscontents of the conversation via the wireless communication unit 110,and more particularly, via the wireless internet module 113 (S550).

Further, prior to performing the conversation executing step S550, theterminal 100 can transmit a message announcing that a conversation usingthe previous contents of the conversation will be executed to thecorrespondent party or parties of the conversation using the previouscontents of the conversation. In doing so, the terminal 100 is able totransmit the previous contents of the conversation together. Thus, aterminal of the correspondent party can selectively display the previouscontents of the conversation as the conversation using the previouscontents of the conversation is executed.

Further, as mentioned in the foregoing description, the conversationcorrespondent party can include a correspondent party (or parties)corresponding to the previous contents of the conversation or person(s)designated as the conversation correspondent party (parties).

If there exists a party that is unavailable among the correspondentparties, the terminal can transmit a message announcing that aconversation using the previous contents of the conversation will beexecuted to the unavailable person.

Therefore, when a status of the unavailable person is changed into anavailable status, the unavailable person understands that theconversation using the previous contents of the conversation is inprogress and is then able to decide whether to participate in theconversation.

Further, the unavailable person includes a person who is substantiallyunable to participate in the conversation due to a current statusincluding log-off, absence, conversation rejection or the like. Inparticular, if the correspondent party (or parties) is in theunavailable status, the person is unable to perform the conversationusing the previous contents of the conversation.

If a status at least one of the correspondent parties is changed intothe available status in the future, the conversation using the previouscontents of the conversation can be performed by notifying the changedstatus to the user.

Also, if a file transmission was in progress in a previous conversationand if the user decides to transmit the file, the terminal 100 transmitsthe file, which was being transmitted in the previous conversation, to afile receiving correspondent party while performing the conversationexecuting step S550.

Similarly, if a file reception was in progress in a previousconversation and if the user decides to receive the file, the terminal100 receives the file, which was being received in the previousconversation, from a file transmitting correspondent party whileperforming the conversation executing step S550.

If the file transmitting correspondent party is a an unavailable person,the terminal 100 informs the user that the file reception is notpossible at this time. In addition, if the file transmittingcorrespondent party enters an available status, the terminal 100notifies the new status to the user. Hence, the terminal 100 enables thefile transmitting correspondent party to transmit the file, which wasbeing transmitted in the previous conversation, by leading the filetransmitting correspondent party to participate in the conversationusing the previous contents of the conversation.

The conversation executing step S550 will now be explained in moredetail. In particular, FIGS. 19 to 22B are overviews of display screensillustrating a process of displaying conversation statuses in a terminalaccording to one embodiment of the present invention.

Referring to FIG. 19, while the terminal 100 displays contents of theprevious conversation, the user can select an “Execute PreviousConversation option 1911 in the terminal 100. Then, if the user selectsthe option 1911, the terminal 100 displays a window 1912 including theoptions ‘Conversation display state’, ‘Conversation unavailable personannouncement setting’ and ‘Conversation content transmission setting’.

If the user selects the ‘Conversation display status’ option in FIG. 19,the terminal 100 displays a window 201 in FIG. 20A allowing the user toselect to display a new contents of the conversation only (‘newconversation’) or both the previous contents of the conversation and thenew contents of the conversation (‘previous+new conversation’).

If the user selects the ‘new conversation’ option in FIG. 20A, theterminal 100 displays only the contents of the conversation of acurrently executed conversation even when executing the conversationusing the previous contents of the conversation (FIG. 20B).

Alternatively, if the user selects the ‘new+previous conversation’option in FIG. 20A, the terminal 100 displays both of the previouscontents of the conversation and the contents of the conversation of thecurrently executed conversation (FIG. 20C).

Further, if the user selects the ‘Conversation unavailable personannouncement setting’ option in FIG. 19, the terminal 100 displays awindow 2110 allowing the user to select options including ‘Announcementsetting’ or ‘Announcement release’ (FIG. 21A). Further, the user is alsoable to select the options ‘Announcement setting’ or ‘Announcementrelease’ for an unavailable party (not shown in the drawings).

If the user selects the ‘Announcement setting’ option in FIG. 21A, whenan unavailable person enters an available status, the terminal 100announces that a correspondent party that used to be unavailable is nowable to participate in a conversation and then allows the user to selectwhether or not to let the person participate in the conversation (FIG.21B). Thus, if the user selects the ‘Yes’ option to let the personparticipate in the conversation, the terminal 100 allows thecorrespondent party, who used to be unavailable, to participate in thecurrently executed conversation using the previous contents of theconversation.

If the user selects the ‘Announcement release’ in FIG. 21A, the terminal100 does not announce that the conversation unavailable person is now inan available status. Meanwhile, it is also possible that if aconversation participation is selected by the correspondent party thatused to be unavailable, the terminal 100 enables the correspondentparty, who used to be unavailable, to participate in the conversationregardless of a presence or non-presence of the user's selection.

In addition, if the correspondent party that used to be unavailableenters the conversation available status, the terminal 100 allows thecorrespondent party that used to be unavailable to participate in thecurrently executed conversation using the previous contents of theconversation regardless of a presence or non-presence of the user'sselection.

If the user selects the ‘Conversation content transmission setting’option in FIG. 19, the terminal 100 displays a window 2210 allowing theuser to select whether to transmit the previous contents of theconversation to the conversation correspondent party (FIG. 22A). Theuser is also able to set whether to transmit the previous contents ofthe conversation per the conversation correspondent party.

In addition, if the user selects the ‘conversation transmission setting’option in FIG. 22A, the terminal 100 transmits the previous contents ofthe conversation to the conversation correspondent party and announcesthat the previous contents of the conversation is being transmitted tothe conversation correspondent party (FIG. 22B).

Hence, a terminal of the conversation correspondent party is able todisplay the previous contents of the conversation together with the newcontents of the conversation.

Next, FIGS. 23A to 23C are overviews of display screens illustrating anoperation of performing a conversation using previous contents of theconversation having been performed together with a video call service.This embodiment is also applicable to performing a conversation togetherwith a broadcast signal sharing service, a video sharing service, and/ora network, game service, etc.

In addition, while the terminal 100 displays previous contents of theconversation and a video call image, the terminal 100 allows the user toselect a ‘Execute Previous Conversation’ option 2311 for executing aconversation using the previous contents of the conversation (FIG. 23A).

In this embodiment, the terminal 100 displays status information of aparty corresponding to an IMS or a video call service. If the userselects the ‘Execute Previous Conversation’ option 2311, the terminal100 enables the user to select whether or not to connect the video callwith parties of a video call executed together with the previousconversation (FIG. 23B). Further, in this instance, the user is able toselect a specific party to be connected for the video call from aplurality of parties of the previous video call.

If the user selects ‘Yes’ (video call connect) in FIG. 23B, the terminal100 performs the conversation using the previous contents of theconversation and simultaneously performs the video call with the partiesof the previous video call or the selected one of the parties (FIG.23C).

In addition, the above various embodiments may be implemented in acomputer-readable medium using, for example, computer software,hardware, or some combination thereof. For a hardware implementation,the embodiments described above may be implemented within one or moreapplication specific integrated circuits (ASICs), digital signalprocessors (DSPs), digital signal processing devices (DSPDs),programmable logic devices (PLDs), field programmable gate arrays(FPGAs), processors, controllers, micro-controllers, microprocessors,other electronic units designed to perform the functions describedherein, or a selective combination thereof.

For a software implementation, the embodiments described herein may beimplemented with separate software modules, such as procedures andfunctions, each of which perform one or more of the functions andoperations described herein. The software codes can be implemented witha software application written in any suitable programming language andmay be stored in memory (for example, the memory 160), and executed by acontroller or processor (for example, the controller 180).

In addition, the mobile terminal 100 may be implemented in a variety ofdifferent configurations. Examples of such configurations include afolder-type, slide-type, bar-type, rotational-type, swing-type andcombinations thereof.

Accordingly, the present invention provides several advantages.

First, embodiments of the present invention facilitate a conversationthrough an IMS to be executed using previous contents of theconversation.

Secondly, embodiments of the present invention perform a conversationusing previous contents of the conversation, thereby avoidingdesignating conversation parties one by one.

Thirdly, embodiments of the present invention perform a conversationusing previous contents of the conversation, thereby enabling a previousconversation, which was disconnected, to continue.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present inventionwithout departing from the spirit or scope of the inventions. Thus, itis intended that the present invention covers the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

What is claimed is:
 1. A mobile terminal comprising: a display unit; awireless communication unit configured to communicate with at least oneexternal device via a wireless network; and a controller configured to:display, on the display unit, a message conversation list including atleast one message conversation item, wherein each of the at least onemessage conversation item represents a corresponding previous messageconversation with a corresponding external device, in response to afirst command of selecting a specific one of the at least messageconversation item in the message conversation list, display, on thedisplay unit, at least one received or transmitted message belonging tothe specific message conversation item, wherein the at least onereceived or transmitted message is displayed together with an incompletefile transceiving indicator when a file transceiving was incompletelyterminated during a specific previous message conversation correspondingto the specific message conversation item, and in response to a secondcommand of selecting a file transceiving option displayed together withthe at least one received or transmitted message on the display unit,resume the file transceiving with respect to a specific external devicecorresponding to the selected message conversation item, wherein the atleast one received or transmitted message is displayed together with asecond incomplete file transceiving indicator when a second filetransceiving was incompletely terminated during the specific previousmessage conversation corresponding to the specific message conversationitem.
 2. The mobile terminal of claim 1, wherein both the incompletefile transceiving indicator and the second incomplete file transceivingindicator are displayed together with the at least one received ortransmitted message.
 3. The mobile terminal of claim 1, wherein a firstmessage conversation item of the at least one message conversation itemis displayed in a non-abbreviated style, when the first messageconversation item has enough space to display a message content of thefirst message conversation item.
 4. The mobile terminal of claim 1,wherein a second message conversation item of the at least one messageconversation item is displayed in an abbreviated style, when the secondmessage conversation item has an insufficient space to display a messagecontent of the second message conversation item.
 5. The mobile terminalof claim 1, wherein the message conversation list includes a pluralityof message conversation items.
 6. The mobile terminal of claim 5,wherein each of the plurality of message conversation items correspondsto a different external device.
 7. The mobile terminal of claim 5,wherein the plurality of message conversation items are arrangedaccording to a time sequence.
 8. The mobile terminal of claim 1, whereinthe controller is configured to display, on the display unit, as each ofthe at least message conversation item, an identifier of thecorresponding external device and a date of the corresponding previousmessage conversation together with a portion of a message content of thecorresponding previous message conversation.
 9. The mobile terminal ofclaim 1, wherein the controller is configured to, when a new message isreceived or transmitted after displaying the incomplete filetransceiving indicator and the second incomplete file transceivingindicator, display, on the display unit, the new message below the atleast one received or transmitted message and the incomplete filetransceiving indicator and the second incomplete file transceivingindicator.
 10. The mobile terminal of claim 1, wherein the controller isconfigured to provide an edit option to edit at least a portion of thedisplayed at least one received or transmitted message.
 11. The mobileterminal of claim 10, wherein the controller is configured to display,on the display unit, the edit option together with the incomplete filetransceiving indicator and the second incomplete file transceivingindicator.
 12. The terminal of claim 10, wherein the controller isconfigured to, in response to a third command of selecting the editoption, provide a delete option to delete the at least a portion of thedisplayed at least one received or transmitted message.
 13. The mobileterminal of claim 12, wherein the controller is configured to display,on the display unit, the delete option together with the incomplete filetransceiving indicator and the second incomplete file transceivingindicator.
 14. The mobile terminal of claim 1, further comprising amemory configured to store state information relevant to the filetransceiving during the corresponding previous message conversation. 15.The mobile terminal of claim 1, wherein the controller is furtherconfigured to, in response to the first command, display, on the displayunit, a content of the at least one received or transmitted message in anon-abbreviated style.
 16. The mobile terminal of claim 1, wherein thecontroller is further configured to, in response to the first command,display, on the display unit, contents of all received or transmittedmessages including the at least one received or transmitted message in anon-abbreviated style.
 17. The mobile terminal of claim 1, wherein thecontroller is further configured to, in response to the first command,display, on the display unit, contents of at least two received ortransmitted messages including the at least one received or transmittedmessage in a non-abbreviated style.
 18. The mobile terminal of claim 1,wherein the at least one message conversation item in the messageconversation list has the at least one received or transmitted message.19. A mobile terminal comprising: a display unit; a wirelesscommunication unit configured to communicate with at least one externaldevice via a wireless network; and a controller configured to: display,on the display unit, a message conversation list including at least onemessage conversation item, wherein each of the at least one messageconversation item represents a corresponding previous messageconversation with a corresponding external device, in response to afirst command of selecting a specific one of the at least messageconversation item in the message conversation list, display, on thedisplay unit, at least one received or transmitted message belonging tothe specific message conversation item, wherein the at least onereceived or transmitted message is displayed together with a firstincomplete file transceiving indicator and a second incomplete filetransceiving indicator when a first file transceiving and a second filetransceiving were incompletely terminated during a specific previousmessage conversation corresponding to the specific message conversationitem, and in response to a second command of selecting a filetransceiving option displayed together with the at least one received ortransmitted message on the display unit, resume the first filetransceiving with respect to a specific external device corresponding tothe selected message conversation item.
 20. The mobile terminal of claim19, wherein a first message conversation item of the at least onemessage conversation item is displayed in a non-abbreviated style, whenthe first message conversation item has enough space to display amessage content of the first message conversation item.
 21. The mobileterminal of claim 19, wherein a second message conversation item of theat least one message conversation item is displayed in an abbreviatedstyle, when the second message conversation item has an insufficientspace to display a message content of the second message conversationitem.
 22. The mobile terminal of claim 19, wherein the messageconversation list includes a plurality of message conversation items.23. The mobile terminal of claim 22, wherein each of the plurality ofmessage conversation items corresponds to a different external device.24. The mobile terminal of claim 22, wherein the plurality of messageconversation items are arranged according to a time sequence.
 25. Themobile terminal of claim 19, wherein the controller is configured todisplay, on the display unit, as each of the at least messageconversation item, an identifier of the corresponding external deviceand a date of the corresponding previous message conversation togetherwith a portion of a message content of the corresponding previousmessage conversation.
 26. The mobile terminal of claim 19, wherein thecontroller is configured to, when a new message is received ortransmitted after displaying the first incomplete file transceivingindicator and the second incomplete file transceiving indicator,display, on the display unit, the new message below the at least onereceived or transmitted message and the first incomplete filetransceiving indicator and the second incomplete file transceivingindicator.
 27. The mobile terminal of claim 19, wherein the controlleris configured to provide an edit option to edit at least a portion ofthe displayed at least one received or transmitted message.
 28. Themobile terminal of claim 27, wherein the controller is configured todisplay, on the display unit, the edit option together with the firstincomplete file transceiving indicator and the second incomplete filetransceiving indicator.
 29. The terminal of claim 27, wherein thecontroller is configured to, in response to a third command of selectingthe edit option, provide a delete option to delete the at least aportion of the displayed at least one received or transmitted message.30. The mobile terminal of claim 29, wherein the controller isconfigured to display, on the display unit, the delete option togetherwith the first incomplete file transceiving indicator and the secondincomplete file transceiving indicator.
 31. The mobile terminal of claim19, further comprising a memory configured to store state informationrelevant to the first file transceiving during the correspondingprevious message conversation.
 32. The mobile terminal of claim 19,wherein the controller is further configured to, in response to thefirst command, display, on the display unit, a content of the at leastone received or transmitted message in a non-abbreviated style.
 33. Themobile terminal of claim 19, wherein the controller is furtherconfigured to, in response to the first command, display, on the displayunit, contents of all received or transmitted messages including the atleast one received or transmitted message in a non-abbreviated style.34. The mobile terminal of claim 19, wherein the controller is furtherconfigured to, in response to the first command, display, on the displayunit, contents of at least two received or transmitted messagesincluding the at least one received or transmitted message in anon-abbreviated style.
 35. The mobile terminal of claim 19, wherein theat least one message conversation item in the message conversation listhas the at least one received or transmitted message.
 36. A method ofcontrolling a mobile terminal, the method comprising: communicating withat least one external device via a wireless network; displaying, on adisplay unit, a message conversation list including at least one messageconversation item, wherein each of the at least one message conversationitem represents a corresponding previous message conversation with acorresponding external device; in response to a first command ofselecting a specific one of the at least message conversation item inthe message conversation list, displaying, on the display unit, at leastone received or transmitted message belonging to the specific messageconversation item, wherein the at least one received or transmittedmessage is displayed together with an incomplete file transceivingindicator when a file transceiving was incompletely terminated during aspecific previous message conversation corresponding to the specificmessage conversation item; and in response to a second command ofselecting a file transceiving option displayed together with the atleast one received or transmitted message on the display unit, resumingthe file transceiving with respect to a specific external devicecorresponding to the selected message conversation item, wherein the atleast one received or transmitted message is displayed together with asecond incomplete file transceiving indicator when a second filetransceiving was incompletely terminated during the specific previousmessage conversation corresponding to the specific message conversationitem.
 37. A method of controlling a mobile terminal, the methodcomprising: communicating with at least one external device via awireless network; displaying, on the display unit, a messageconversation list comprising at least one message conversation item,wherein each of the at least one message conversation item represents acorresponding previous message conversation with a correspondingexternal device; in response to a first command of selecting a specificone of the at least message conversation item in the messageconversation list, displaying, on the display unit, at least onereceived or transmitted message belonging to the specific messageconversation item, wherein the at least one received or transmittedmessage is displayed together with a first incomplete file transceivingindicator and a second incomplete file transceiving indicator when afirst file transceiving and a second file transceiving were incompletelyterminated during a specific previous message conversation correspondingto the specific message conversation item; and in response to a secondcommand of selecting a file transceiving option displayed together withthe at least one received or transmitted message on the display unit,resuming the first file transceiving with respect to a specific externaldevice corresponding to the selected message conversation item.